diff --git a/.github/workflows/buildwin.yml b/.github/workflows/buildwin.yml
index d605c92..f992e0d 100644
--- a/.github/workflows/buildwin.yml
+++ b/.github/workflows/buildwin.yml
@@ -22,8 +22,14 @@ jobs:
           cmake .. -G "MinGW Makefiles" -DCMAKE_SH="CMAKE_SH-NOTFOUND" -DGITBUILD=true
       - name: Build with Makefile
         run: mingw32-make -C build ComSquare
+     - name: Clean up
+       run: |
+         Set-Location build
+         Remove-Item -Recurse -Path * -Exclude ComSquare.exe,bin/*
       - name: Copy shared libs
-        run: Copy-Item -Path 'C:\Program Files\Git\mingw64\bin\*.dll' -Destination build
+        run: |
+          Copy-Item -Path build\bin\*.dll -Destination build
+          Copy-Item -Path 'C:\Program Files\Git\mingw64\bin\*.dll' -Destination build
       - name: Archive production artifact
         uses: actions/upload-artifact@v1
         with: